Time-dependent deformations of concrete beams reinforced with CFRP bars

Arockiasamy, M.; Chidambaram, S.; Amer, A; Shahawy, Mohsen

doi:10.1016/s1359-8368(99)00045-1

Cited by 40 publications

(20 citation statements)

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“…where, ξ = time-dependent factor for sustained loading level, s = flexural stiffness ratio between HCB-strengthened and unstrengthened RC beams ((EI beam + EI HCB )/(EI beam )) and ρ = compression reinforcement ratio of steel bars in the RC beam section. The time-dependent factors found in this study using Equation (2) may be compared with the values found by Chami [10] and Arockiasamy [11] with similar FRP systems and ACI equations [9]. It should be noted that the ACI equation was proposed by steel reinforced concrete beams, while the values of Chami's study were obtained from RC beams with externally bonded CFRP laminates, and the values of Arockiasamy's study were obtained from CFRP bars reinforced with concrete beams.…”

Section: Evaluation Of Time-dependent Factorsmentioning

confidence: 51%

“…Arockiasamy et al [11] investigated the time-dependent deformations of concrete beams reinforced with CFRP bars from four rectangular concrete beams, under four different uniform sustained loadings for nearly two years. Four rectangular concrete beams reinforced with CFRP bars were cast in two sizes: 152 mm × 203 mm × 2438 mm; 152 mm × 152 mm × 2438 mm.…”

Section: Introductionmentioning

confidence: 99%

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Long-Term Behavior of RC Beams Strengthened with Hybrid Composite Beam

et al. 2019

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This paper describes the results of long-term tests on reinforced concrete (RC) beams strengthened with hybrid composite beam (HCB) under two different sustained loads. Test specimens were fabricated to reflect the most common RC beam size used in school buildings in South Korea. The specimens had dimensions of 400 mm (width) × 600 mm (depth) × 6000 mm (length), and were tested with or without external strengthening by a hybrid composite beam (HCB). Test results showed that strengthening the RC beams with HCB not only reduced the instantaneous deflection but was also effective in decreasing long-term deflection. In this study, time-dependent factors were investigated using a modified version of the American Concrete Institute (ACI) equation. Time-dependent factors of HCB-strengthened RC beams found in the present work differed from those of other investigations due to various experimental conditions. In the present study, we found that the ACI equation may not provide a reasonable estimation of the long-term behavior of HCB-strengthened RC beams.

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Section: Evaluation Of Time-dependent Factorsmentioning

confidence: 51%

Section: Introductionmentioning

confidence: 99%

Long-Term Behavior of RC Beams Strengthened with Hybrid Composite Beam

et al. 2019

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“…In the field of external prestressing, FRP composites are promising to be widely used as external tendons for the rehabilitation and construction of various engineering structures . Among the FRP composites, carbon FRP (CFRP) is considered as replacement for the conventional prestressed steel (Arockiasamy et al 2000;Crouch et al 2013;. Currently, three anchor systems can be used to attach the tendon of composite material to the concrete structure: mechanical (wedge-type) anchors, adhesively bonded anchors and composite anchors.…”

Section: Introductionmentioning

confidence: 99%

Experimental and analytical investigation into the stress performance of composite anchors for CFRP tendons

Cai

Yin

Liu

2015

Composites Part B: Engineering

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“…The required stiffness and strength can be achieved by utilizing the tightly bonded assembly of steel tube and concrete core. However, creep of the core concrete is inevitable and may result in significant deformations of concrete structures subjected to a sustained load in the long-term [1][2][3][4]. In addition, shrinkage of the core concrete develops all the time even without external loads [5,6] and it also affects the structural performance severely [7,8].…”

Section: Introductionmentioning

confidence: 99%